/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alipay.sofa.registry.common.model.metaserver.cleaner;

import com.google.common.collect.Sets;
import java.io.Serializable;
import java.util.Collection;
import java.util.Set;

public class AppRevisionSlice implements Serializable {
  private final Set<String> revisions;

  public AppRevisionSlice(Set<String> revisions) {
    this.revisions = revisions;
  }

  public Set<String> getRevisions() {
    return revisions;
  }

  public static AppRevisionSlice merge(Collection<AppRevisionSlice> slices) {
    Set<String> revisions = Sets.newHashSet();
    for (AppRevisionSlice slice : slices) {
      revisions.addAll(slice.revisions);
    }
    return new AppRevisionSlice(revisions);
  }
}
